A young Second Lieutenant approaches the crusty old CSM and asked about the
origin of the commissioned officer insignias.
The CSM replied, "It's history and tradition ... First we give you a gold
bar representing that you are very valuable and also malleable. The silver bar
also represents significant value, but is less malleable. When you make Captain,
your value doubles, hence the two silver bars. As a Colonel you soar over military
masses, hence the eagle. As a General, you are, obviously, a star. Does that
answer your question?"
"Yes," said the Second Lieutenant, "but what about Majors and
Lieutenant Colonels?"
"That goes waaaay back in history ... to the Garden of Eden even. You see
we've always covered our pricks with leaves."